xin/ysyx-workbench
1
0
Fork 0
Code Issues Pull requests 1 Projects Releases Packages Wiki Activity Actions

> compile NEMU

Browse source 
ysyx_22040000 李心杨
Linux calcite 6.6.18 #1-NixOS SMP PREEMPT_DYNAMIC Fri Feb 23 08:25:28 UTC 2024 x86_64 GNU/Linux
 18:21:57  up  21:50,  2 users,  load average: 0.17, 0.54, 0.83
This commit is contained in:
tracer-ysyx 2024-03-05 18:21:57 +08:00 • committed by xinyangli
parent 3aceace0c3
commit 4ca052cb1b
5 changed files with 65 additions and 30 deletions
Download patch file Download diff file Expand all files Collapse all files

3
nemu/default.nix
View file

@ -9,7 +9,6 @@ stdenv.mkDerivation rec {
src = ./.;
NEMU_HOME = "/build/nemu";
nativeBuildInputs = with pkgs; [
gnumake
flex
@ -23,7 +22,7 @@ stdenv.mkDerivation rec {
];
configurePhase = ''
echo pwd=$(pwd)
export NEMU_HOME=$(pwd)
make alldefconfig
'';

10
nemu/src/isa/riscv32/inst.c
View file

@ -23,7 +23,7 @@
#define Mw vaddr_write
enum {
TYPE_I, TYPE_U, TYPE_S,
TYPE_R, TYPE_I, TYPE_U, TYPE_S, TYPE_J,
TYPE_N, // none
};
@ -32,6 +32,7 @@ enum {
#define immI() do { *imm = SEXT(BITS(i, 31, 20), 12); } while(0)
#define immU() do { *imm = SEXT(BITS(i, 31, 12), 20) << 12; } while(0)
#define immS() do { *imm = (SEXT(BITS(i, 31, 25), 7) << 5) | BITS(i, 11, 7); } while(0)
#define immJ() do { *imm = (SEXT(BITS(i, 31, 30), 1) << 20) | BITS(i, 30, 21) << 1 | BITS(i, 21, 20) << 11 | BITS(i, 19, 12) << 12; } while(0)
static void decode_operand(Decode *s, int *rd, word_t *src1, word_t *src2, word_t *imm, int type) {
uint32_t i = s->isa.inst.val;
@ -39,8 +40,10 @@ static void decode_operand(Decode *s, int *rd, word_t *src1, word_t *src2, word_
int rs2 = BITS(i, 24, 20);
*rd = BITS(i, 11, 7);
switch (type) {
case TYPE_R: src1R(); src2R(); break;
case TYPE_I: src1R(); immI(); break;
case TYPE_U: immU(); break;
case TYPE_J: immJ(); break;
case TYPE_S: src1R(); src2R(); immS(); break;
}
}
@ -57,9 +60,14 @@ static int decode_exec(Decode *s) {
}
INSTPAT_START();
INSTPAT("??????? ????? ????? ??? ????? 01101 11", lui , U, R(rd) = imm);
INSTPAT("??????? ????? ????? ??? ????? 00101 11", auipc , U, R(rd) = s->pc + imm);
// INSTPAT("??????? ????? ????? ??? ????? 11011 11", jal, , J, do {s->dnpc = s->pc + imm; R(rd) = s->pc + 4; } while(0));
// INSTPAT("??????? ????? ????? ??? ????? 11001 11", jalr , I, do {s->dnpc = s->pc + src1; R(rd) = s->pc + 4); } while(0);
INSTPAT("??????? ????? ????? 100 ????? 00000 11", lbu , I, R(rd) = Mr(src1 + imm, 1));
INSTPAT("??????? ????? ????? 000 ????? 01000 11", sb , S, Mw(src1 + imm, 1, src2));
INSTPAT("??????? ????? ????? 000 ????? 00100 11", addi , I, R(rd) = src1 + (sword_t)imm);
INSTPAT("0000000 ????? ????? 000 ????? 01100 11", add , R, R(rd) = src1 + src2);
INSTPAT("0000000 00001 00000 000 00000 11100 11", ebreak , N, NEMUTRAP(s->pc, R(10))); // R(10) is $a0
INSTPAT("??????? ????? ????? ??? ????? ????? ??", inv , N, INV(s->pc));